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Concurrent Versus Sequential Intrapleural tPA-DNase Administration: Comparative Effectiveness and Safety in Pleural

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Concurrent administration of tissue plasminogen activator (tPA) and deoxyribonuclease (DNase) for pleural infections led to better radiographic resolution and reduced need for surgery compared to sequential dosing. This approach showed improved effectiveness without increased safety concerns.

Keywords:
Deoxyribonuclease (DNase)EmpyemaIntrapleural TherapyPleural InfectionTissue Plasminogen Activator (tPA)

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Area of Science:

  • Pulmonology
  • Thoracic Surgery
  • Pharmacology

Background:

  • Intrapleural tissue plasminogen activator (tPA) plus deoxyribonuclease (DNase) is used for pleural infection drainage.
  • The optimal administration sequence for tPA/DNase is not well-defined.

Purpose of the Study:

  • To compare the effectiveness and safety of concurrent versus sequential intrapleural tPA/DNase administration in patients with infectious pleural effusions.
  • To evaluate radiographic resolution, need for surgical intervention, and hospital length of stay.

Main Methods:

  • Retrospective cohort study of adults with infectious pleural effusions receiving intrapleural tPA and DNase.
  • Exposure groups: concurrent co-instillation versus sequential administration (tPA then DNase 1 hour later).
  • Outcomes assessed: radiographic resolution, surgical intervention (VATS/open decortication), length of stay, and safety endpoints (analgesic use, hemoglobin trends, transfusion).

Main Results:

  • Concurrent administration was associated with significantly higher radiographic resolution (80% vs 52%) compared to sequential therapy.
  • Surgical intervention was less frequent with concurrent administration (13% vs 30%).
  • No meaningful differences in analgesic utilization or bleeding-related safety signals were observed between groups.

Conclusions:

  • Concurrent intrapleural tPA/DNase administration appears more effective than sequential dosing for infectious pleural effusions.
  • This strategy is associated with improved radiographic resolution and reduced need for surgery.
  • Further prospective studies are recommended to confirm these findings and identify optimal patient candidates.